whatever you do to one side, you must do to the other side to keep the equation balanced.
in order to isolate the variable (x), you need to divide by 2. Since you are dividing the right side by 2, then you must divide the left side by 2.
-10÷2 = 2÷2x
-5 = 1x
-5 = x
Answer:
C, 3
Step-by-step explanation:
By creating a best line of fit you can get the sets of points (16,50) and (12,40)
Using these to find the slope we can get 
-10/-4 is 2.5 The best approximation would be C, because if you round it up to the nearest number you would get 3.
It would be 89.
You can also just look up a list of prime numbers online.
Answer:
Step-by-step explanation:
Side Original length Copy length
a 4 1 
b 6 1.5 
c 20 5 
d 16 4 
C. 19.42% because you subtract 389.85 from 314.15 which equals 75.7. So then set it up like an algebraic equation. 389.85x=75.7 divide 75.7 by 389.85 to find the decimal. Then you have to move the decimal to the right two places, since it is a percentage. And then round your answer, so c. 19.42% is your answer. Hope this helped! :)